Three port whistle



FIG. 1 is a top right side perspective view of a three port whistle showing the present design.

FIG. 2 is a bottom right side perspective view of the three port whistle shown in FIG. 1.

FIG. 3 is a right side plan view of the three port whistle shown in FIG. 1.

FIG. 4 is a left side plan view of the three port whistle shown in FIG. 1.

FIG. 5 is a top plan view of the three port whistle shown in FIG. 1.

FIG. 6 is a front plan view of the three port whistle shown in FIG. 1.

FIG. 7 is a bottom plan view of the three port whistle shown in FIG. 1; and,

FIG. 8 is a rear plan view of the three port whistle shown in FIG. 1. 

The ornamental design for a three port whistle, as shown and described. 